Server error

I don't know how to fix a server error on ps4 I have already checked my WiFi on my console and it's fine. But every time I try to upload any lot to my gallery it keeps saying there is a server error, I can upload the rooms of my build but not the full build itself, there is also no custom content either. I've tried to upload it to both the gallery and my library but it still does not work. please can someone lend some advice on how to fix this issue, thank you.